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Image of the Day

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Keeping Current

August 15, 2007Marvel Stalcup (foreground, with glasses) and Gus Day launch
instruments from the research vessel Crawford in the 1960s. The sensor at
bottom was an early electronic current
meter, used to determine curent speed. The sensor at top of the
cylinder
captured current direction. Data was recorded within the center
cylinder on photographic film. (Photo courtesy of Woods Hole Oceanographic Institution archives)

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